Specification Brand : Lovejoy BulletPoint1 : For use with Lovejoy L type Jaw style flexible coupling assembly (sold separately) BulletPoint2 : Iron sintered with powdered metals for strength, durability, and corrosion resistance BulletPoint3 : Transfers shock and misalignment to the center element of the coupling assembly for reduced wear on the shaft assembly BulletPoint4 : Resistant to oil, dirt, sand, moisture, and grease BulletPoint5 : Fail-safe (will still perform if elastomeric “spider” fails) BulletPoint6 : No metal to metal contact Color : Blue ConnectorType : Coupling DriveSystem : External Hex ExteriorFinish : Silver ExternallyAssignedProductIdentifier1 : 685144102119 ExternallyAssignedProductIdentifier2 : 0685144102119 FinishType : Brass ItemName : Lovejoy - 68514410211 10211 Size L050 Standard Jaw Coupling Hub, Sintered Iron, Inch, 0.5" Bore, 1.08" OD, 0.125" x 0.063" Keyway ItemPackageDimensions_Height : 2.54 centimeters ItemPackageDimensions_Length : 15.748 centimeters ItemPackageDimensions_Width : 13.716 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : spider-couplings Manufacturer : Lovejoy Material : Iron Material1 : Copper Material2 : Brass MetalType : Aluminum MetalType1 : Copper MetalType2 : Brass ModelNumber : YE010-2 NumberOfItems : 1 PartNumber : 68514410211 ProductDescription : Product Name: 6.35mm to 8mm Bore Aluminium Plum Flexible Shaft Coupling Servo Stepper Motor Jaw D20xL25 Connector Flexible Shaft Couplers Material: made of high quality Aluminum alloy, Surface oxidation treatment,high hardness and excellent performance Type: Plum Shaped Shaft Usage: Bore Diameter: 6.35mm to 8mm / 0.25inch to 0.31inch Size( L*D): L25mm x D20mm/0.98inch x 0.79inch Main Color: Silver Tone,Red The shaft couplers widely used for 3D Printer, CNC machines, DIY Encoder, Servo Motors, Spindle, Step motor, Ballscrew etc. Package Included: 2pcs Plum Shaft Couplers 1pcs Allen Key Please Note: The shaft coupler is not elastic, can not modify the concentricity. Shaft must be located in a straight line. If your equipment is eccentric already, then it will make noise and cause off-centering. Any question or problem, do not hesitate to contact us, we will reply you within 24 hours As Manual measurement, please allow slight errors on size The color may exist slight difference due to different screen displays